%0 Journal Article
%T Perimeter Security System Based on Ultra-Weak Fiber Bragg Grating Array
%A Zhihui Luo
%A Hao Xiang
%A Yu Zhang
%A Bing Xu
%J Optics and Photonics Journal
%P 156-169
%@ 2160-889X
%D 2022
%I Scientific Research Publishing
%R 10.4236/opj.2022.126012
%X <div style=\"text-align:justify;\">
	A perimeter security system based on ultra-weak fiber Bragg grating high-speed wavelength demodulation was proposed. The demodulation system for signal acquisition and high-speed wavelength calculation was designed based on field programmable gate array (FPGA) platform. The principle of ultra-weak fiber Bragg grating high-speed demodulation and signal recognition method were analyzed theoretically, and the Support Vector Machine model was introduced to optimize the event recognition accuracy of the system. A perimeter security experimental system containing 1000 ultra-weak fiber Bragg gratings, ultra-weak fiber Bragg grating sense optical cables with a diameter of 2.0 mm and a reflectivity of 0.01%, steel space frames and demodulation equipments was built to recognize four typical events such as knocking, shaking, wind blowing and rainfall. The experimental resulted show that the system has a spatial resolution of 1m and an acquisition frequency of 200 Hz. The joint time-frequency domain detection method is used to achieve 99.2% alarm accuracy, and 98% recognition accuracy of two intrusion events, which has good anti-interference performance.
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%K Perimeter Security
%K Ultra-Weak Fiber Bragg Grating
%K Vibration Sensor
%K Pattern Recognition
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=118308